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The Glowing Bullet: The Science of Hypersonic Re-entry
When a vehicle re-enters the Earth's atmosphere at Mach 20, it faces a violent transition where the air itself becomes a furnace of superheated plasma reaching temperatures that exceed 3,000 degrees Celsius. This episode explores the "glowing bullet paradox," examining the incredible material science required to prevent a multi-ton strategic asset from vaporizing into molten slag the moment it hits the dense air of the Karman line. We move beyond the misconception of simple friction to explain the physics of adiabatic compression, the critical role of the stagnation point, and the "miracle of…
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